<template>
<div>
<!-- 1.导航面包屑 -->
  <el-breadcrumb separator-class="el-icon-arrow-right">
    <el-breadcrumb-item :to="{path: '/dashBook'}">首页</el-breadcrumb-item>
    <el-breadcrumb-item >学员信息管理</el-breadcrumb-item>
    <el-breadcrumb-item >学员信息管理</el-breadcrumb-item>
  </el-breadcrumb>

  <el-card style="margin-top: 10px;">
    <!--  1.模糊查询  -->
    <el-form :model="queryGrade" :inline="true" style="width: 60%" size="small">
      <el-form-item label="年级名称:">
        <el-input v-model="queryGrade.gradeName" placeholder="请输入需要查询的年级名次"
                  clearalble @clear="getGradeList" @keyup.enter.native="getGradeList"></el-input>
      </el-form-item>
      <el-form-item>
        <el-button type="info" class="el-icon-refresh-left" plain>重置</el-button>
        <el-button type="primary" class="el-icon-search" plain @click="getGradeList">查询</el-button>
      </el-form-item>
    </el-form>
    <div >
      <el-button size="small" type="success" class="el-icon-folder-add" plain @click="showAddDialog">新增</el-button>
      <el-button size="small" type="danger" class="el-icon-delete" plain @click="deleteByGradeIds">批量删除</el-button>
    </div>
    <!--  2.列表 table
    @selection-change="handleSelectionChange" 需要使用一个函数或者方法去获取选中的值
    -->
    <el-table :data="gradeList" border stripe style="width: 70%;margin-top: 20px;"
              @selection-change="handleSelectionChange">
      <el-table-column type="selection" width="50"></el-table-column> <!-- 选项框 -->
      <el-table-column label="年级编号" prop="gradeId" width="120"></el-table-column>
      <el-table-column label="年级名称">
        <template slot-scope="scope">
          <el-popover trigger="hover" placement="top">
            <p>年级名次:{{scope.row.gradeName}}</p>
            <div slot="reference" class="name-wrapper">
              <el-tag size="medium">{{scope.row.gradeName}}</el-tag>
            </div>
          </el-popover>
        </template>
      </el-table-column>
      <el-table-column label="备注">
        <template slot-scope="scope">
          <el-popover trigger="hover" placement="top">
            <p>备注:{{scope.row.remarks}}</p>
            <div slot="reference" class="name-wrapper">
              <el-tag size="medium">{{scope.row.remarks}}</el-tag>
            </div>
          </el-popover>
        </template>
      </el-table-column>
      <el-table-column label="操作">
        <template slot-scope="scope">
          <el-button size="small" type="success" class="el-icon-folder-add" plain @click="showUpdateDialog(scope.row.gradeId)">编辑</el-button>
          <el-button size="small" type="danger" class="el-icon-delete" plain>删除</el-button>
        </template>
      </el-table-column>
    </el-table>
    <!--  3.分页  -->

    <!--  3.新增和编辑  -->
    <el-dialog :title="gradeTitle" :visible.sync="addOrUpdateDialog" style="width: 70%">
      <span>
        <el-form size="small" :model="gradeForm" label-width="110px" :rules="gradeFormRules" ref="gradeForm">
          <el-form-item label="年级名称：" prop="gradeName">
            <el-input type="text" v-model="gradeForm.gradeName" placeholder="请输入年级名称" clearable></el-input>
          </el-form-item>
          <el-form-item label="备注：">
            <el-input type="textarea" v-model="gradeForm.remarks" placeholder="请输入说明" clearable></el-input>
          </el-form-item>
        </el-form>
      </span>
      <span slot="footer" class="dialog-footer">
        <el-button type="info" class="el-icon-refresh" plain size="small" >取消</el-button>
        <el-button type="success" class="el-icon-finished" plain size="small" @click="saveGradeInfo">保存</el-button>
      </span>
    </el-dialog>
  </el-card>
</div>

</template>

<script>
export default {
  name: "GradeManage",
  data(){
    return {
      gradeFormRules:{
        gradeName:[
          {required: true, message: '请输入年级名称',trigger: 'blur'},
          {min: 2,max: 20,message: "请输入长度为2-20位字符",trigger: 'blur'}
        ]
      },
      gradeTitle: '',
      gradeList:[],
      queryGrade:{
        pageNum: 1, //页码
        pageSize: 10, // 每页显示多少条
        gradeName: '' // 按照年级名称去查询
      },
      greadSet:[],
      gradeForm:{
        gradeId: '',
        gradeName: '',
        remarks: ''
      },
      addOrUpdateDialog: false,
    }
  },
  /*vue 生命周期函数*/
  created(){
      //当我们的页面在浏览器上面被创建的时候需要调用created()方法
    this.getGradeList() //抽象方法 结构没有大括号
  },
  methods:{
    showUpdateDialog(gradeId){
      // 查询并且回显到弹框里面
      this.$http.get('/grade/edit/'+gradeId).then(res =>{
        if(res.data.success){
          this.gradeForm = res.data.data
        }else{
          this.$message.error("查无此数据!")
        }
      })
      this.addOrUpdateDialog = true;
    },
    saveGradeInfo(){
      this.$refs.gradeForm.validate(valid =>{
        if(valid){ // valid为true 代表表单必填校验通过
          if(this.gradeForm.gradeId){
            // 就走更新操作
            this.updateGrade();
          }else{
            //gradeId为空就去保存数据到表:c_grade中
            this.saveGrade();
          }
        }else{
          this.$message.error("必填项不能为空,请重新输入!")
        }
      })
    },
    updateGrade(){
      this.$http.put('/grade/update/'+this.gradeForm.gradeId,this.gradeForm).then(res =>{
        if(res.data.success){
          // 1.保存成功提示
          this.$notify({
            title: "操作成功",
            message: "年级信息更新成功",
            type: "success"
          })
          // 2.关闭对话框
          this.addOrUpdateDialog = false
          // 3.重新加载列表
          this.getGradeList()
        }else{
          this.$message.error("年级信息保存失败:",res.data.errorMsg)
        }
      })
    },
    saveGrade(){
      this.$http.post('/grade/add',this.gradeForm).then(res =>{
        if(res.data.success){
          this.$message.success("保存数据成功")
          this.addOrUpdateDialog = false
          this.getGradeList()
        }else{
          this.$message.error("保存数据失败:{}",res.data.errorMsg)
        }
      })
    },
    showAddDialog(){
      this.gradeTitle = '新增年级信息'
      this.gradeForm = {}
      this.addOrUpdateDialog = true;
    },
    async  deleteByGradeIds(){
      if(this.greadSet.length>0){
        const con = await this.$confirm('此操作将永久删除选中的数据, 是否继续?', '提示', {
            confirmButtonText: '确定',
            cancelButtonText: '取消',
            type: 'warning'
          }).catch(() => {
            this.$message({
              type: 'info',
              message: '已取消删除'
            });
          });
        if(con === 'confirm'){
          // 点击确定  进来
          for (var gread of this.greadSet) {
            //console.log(gread.gradeId)
            const {data: res} = await this.$http.delete('/grade/delete/'+gread.gradeId)
              if(!res.success){
                this.$message.error("删除数据失败：{}",res.data.errorMsg)
              }
          }
          this.$notify({
            title: '操作成功',
            message: '删除数据成功',
            type: 'success'
          })
          this.getGradeList()
        }
      }

    },

    handleSelectionChange(value){
      // 将选中的值复制给 数组
      this.greadSet = value
      console.log("获取复选框选中的值：{}",this.greadSet)
    },
    // 实现方法,里面包裹的是具体操作步骤 结构用大括号包裹起来
    async getGradeList(){
      const {data : res} = await this.$http.get('/grade/findList',{params: this.queryGrade})
      if(res.success){ // 发起http  get请求,成功响应返回数据
        console.log(res)
        this.gradeList = res.data.rows;
        //this.total = res.data.total;
      }else{
        this.$message.error("查无此数据!",res.errorMsg)
      }
      //1.
      //2.
      //3.
    },
  }
}
</script>

<style scoped>

</style>
